Rack-cutting apparatus.



No. 780,314. PATENTED JAN. 17, 1905. L. T. WEISS. BACK CUTTINGAPPARATUS.

AIPPLIOATION FILED DEO.2B,1903.

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Q QALIMQQAQQ 7 w #223 SIM/001mm i 6 v as, .dqcum W w STATES PatentedJanuary 17, "1905.

PATENT OFFICE.

LOUIS T. WEISS, OF NEW YORK, N. Y., ASSIGNOR IO VVILL'IAM M. SPEER, OFNEW YORK, N. Y.

RACK-(JUTTING APPARATUS- SPECIFICATION forming part of Letters PatentNo. 780,314, dated January 17, 1905.

Application filed December 28, 1908. Serial No. 186,785.

To all whom, it may concern:

Be it known that 1, LOUIS T.Wmss, acitizen of the United States ofAmerica, and a resident of the boronghof Brooklyn, county of Kings,

city and State of New York, have invented certain new and usefulImprovements in Back- Outting Apparatus, of which the following is aspecification.

My invention relates in general to machinetools; and more specificallyit consists of an improved attachment for the ordinary form ofplaning-machine having a reciprocating bed by the use of which saidplaning-machines may be employed to cut toothed racks.

I5 One form of my invention is illustrated in the accompanying twosheets or drawings, in WhlCll Figure 1 is an end elevation of a planerwith parts broken away, showing my invention ap- 2o plied thereto. Fig.2 is an enlarged detail cross-section of the planer cross-head andtoolcarrier. Fig. 3 is an enlarged detail elevation of the tool-carrier,my attachment thereto, and. a rack in the process of being cut.

Tlhroughout the drawings like referenceligures indicate like parts.

Fig. 1 shows an ordinary form of planer having the base 1, thereciprocating bed 2, the housing 3, and the verticallymovable ocross-head i, mounted on said housing. On the cross-head is mounted theslide 5, capable of horizontal reciprocation thereon and carrying theswinging tool-holder 6. On this tool-holder is the stud-shaft 7, onwhich is freely jonrnaled the gear-cutter 8, having radial cutting-teethcorresponding in shape to the profile of the gear-teeth with which therack to be cut is to cooperate. Also journaled on the tool-carrier so asto freely re- 4 Volvo is the idler-gear 9, which meshes with thegear-cutter 8. The master-rack 10, which corresponds to the racks whichare to be cut, is mounted in the cross-head 4: so as to prevent anyendwise movement of said rack and has its teeth meshing in theidler-gear 9. Preferably this rack is guided by the clamp 11, which isbolted to the tool-carrier.

12 represents a piece of material clamped to the reciprocating bed 2 ofthe planer and in which a number of teeth 12 have already 5 been cut.

In order to prevent chattering oi' the gears cutter 8. Imay employasmall spring-plunger 13, located in the tool-carrier and pressingagainst the inner upper face oi? the gear-cutter, as shown in Fig. 2.

The operation of my invention is as follows: A considerable number ofpieces 12, which are to be formed into racks, may be clamped to the bed2 of the planer in any ordinary manner, and the tool-carrier beingproperly adjusted so that the cutter will first engage one end of saidpieces the planer is started up. It is evident that as the workpiecesare carried back and forth under the 5 cutter the same will cut them outtransversely and as the regular feed motion of the planer sends thetool-carrier along the cross-head transversely of the planer-bed theidler-gear 9 will roll on the master-rack 10, giving the 7 gear-cutter 8a similar rotation in the opposite direction, so that the radial teethof said gear-cutter will be presented to the workpieces in a manner tocut outaseries of racks each of which will be the counterpart of themaster-rack 10.

The advantages of my invention comprise its cheapness and readyadaptability to any ordinary form of planer and the facility with whichlarge numbers of racks may be cut at 30 one time, thereby producing agreat economy of operation.

It is evident that various changes would be made in the details of theconstruction above described when the invention is applied to 5 planersof slightly-diti'erent construction, but the principle of operationwould remain the same. It is also evident that other forms of connectinggearing between the rotary cutter and the master-rack might be employedand 9 the location and manner of mounting said rack might be varied solong as the master-rack is held stationary against endwise movemeiit andthe rotary cutter is given a rotation exactly corresponding to thatwhich it would have it rolled along the face oi the masterraclc, suchrotation being on an axis parallel to the line of travel of thereciprocating bed.

While I have shown and described the cutter as stationary and the bedcarrying the work as reciprocating, it is evident that the invention isnot limited to this exact construction, but might be applied to machinesother wise arranged. So long as the tool has a reciprocating motionrelative to the work it does not matter which is stationary and whichmoves so far as the principle of my invention is concerned.

Having therefore described my invention, What I claim as new, and desireto protect by Letters Patent, is

1. In combination with a planing-machine having the usual reciprocatingbed and transversely-fed tool-holder, of a gear-tooth cutter havingradial cutting-teeth journaled on saidtool-carrier on an axis parallelto the line of travel of the bed, and means for rotating said cutter asthe tool-carrier is fed across the bed of the planer, said meanscomprising a toothed master-rack held against endwise movement, andgearing between the same and the gearcutter.

2. In combination with a planing-machine having the usual reciprocatingbed and transversely-fed tool-holder, of a gear-tooth cutter havingradial cutting-teeth journaled on said tool-carrier on an axis parallelto the line of travel of the bed, and means for rotating said cutter asthe tool-carrier is fed across the bed of the planer, said meanscomprising atoothed master-rack rigidly fastened on the planercross-head, and a gear-wheel loosely journaled on the tool-carrier andmeshing with said master-rack and With said gear-cutter.

3. In combination with a planing-machine having the usual reciprocatingbed and transversely-fed tool-holder, of a gear-tooth cutter havingradial cutting-teeth journaled on said tool-carrier on an axis parallelto the line of travel of the bed, and means for rotating said cutter asthe tool-carrier is fed across the bed of the planer, saidmeanscomprisingatoothed master-rack rigidly fastened on the planercross-head, andagear-Wheel loosely journaled on the tool-carrier andmeshing with said master-rack and with said gear-cutter, together with aguide for said master-rack on said toolcarrier.

4. In combination with a planing-machine having the usual reciprocatingbed and transversely-fed tool-holder, of a gear-tooth cutter havingradial cutting-teeth journaled on said tool-carrier on an axis parallelto the line of travel of the bed, and means for rotating said cutter asthe tool-carrier is fed across the bed of the planer, said meanscomprising a toothed master-rack rigidly fastened on the planercross-head and a gear-wheel loosely journaled on the tool-carrier andmeshing with said master-rack and with said gear-cutter, together with aspring-pressed device mounted in a tool-carrier and bearing on the upperunder side of the gear-cutter.

Signed at New York this 13th day of November, 1903.

LOUIS T. WEISS.

Witnesses:

J. E. PEARSON, A. PARKER-SMITH.

